Master Slider – Text does not sit centred in black box (vertical)

Hi

I’m using the master slider plugin which so far is brilliant. My only issue at the moment is that when I add the slide info I get a black box the full width of the photo (great this is what I want) However, the text is not vertically aligned correctly. The black space above the text is very small but below is much larger about twice the size.

Thanks in advance